# coding: utf-8
# Your code here!

N=int(input())

A,B,C=map(int,input().split())

dic={3:A,5:B,10:C}

dp=[-1]*(N+1)

dp[0]=0

for i in range(N):
    if dp[i]!=-1:
        for n,price in dic.items():
            if i+n<=N:
                dp[i+n]=max(dp[i+n],dp[i]+price)

print(max(dp))